Back-pedaling brake.



No. 633,605. Patented Sept. 26, I899. J. F. McANULT'Y & P. VAN DENBEBGHE.

BACK PEDALING BRAKE.

(Applicnticn filed Mar. 15, 1898.)

(No Model.)

UNITED STATES PATENT OEErcE.

JOHN F. MCANULTY AND PETER VAN DEN BERGIIE, OF PHILADELPHIA,

PENNSYLVANIA; SAID MOAN ULTY ASSIGNOR, BY MESNE ASSIGN- MENTS, OFONE-HALF TO MICHAEL S. LEY, OF SAME PLACE.

BACK-PEDALING BRAKE.

SPECIFICATION forming part of Letters Patent No. 633,605, datedSeptember 26, 1899.

Application filed March 18, 1898. Serial No. 674,307. (No model.)

To (all whom it may CON/0677b.

Be it known that we, JOHN F. MOANULTY and PETER VAN DEN BERGHE, citizensof the United States, residing in the cityand county of Philadelphia,State of Pennsylvania, have invented a new and useful Improvement inBicycles, which improvement is fully set forth in the followingspecification and accompanying drawings.

Our invention relates to bicycles; and it consists of an improvedconstruction of attachments therefor whereby we are enabled to permitthe forward movement of the bicycle to continue while the pedals andcrankaxle remain stationary.

It also consists of an improved construction of braking device which isautomatically applied during the act of back-pedaling.

It further consists of novel details of construction, all as will behereinafter fully set forth, and particularly pointed out in the claims.

Figure 1 represents a side elevation of attachments fora bicycleembodying our invention, certain portions thereof being shown insection. Fig. 2 represents a section on line :0 50, Fig. 1. Fig. 3represents a plan View, partly in section, of a portion of the rear axleseen at the left of Fig. 1, showing a different manner of applying a dogor pawl thereto from that seen in Fig. 1. Fig. represents a perspectiveview of a shell or casing adapted to inclose a portion of the crankaXle,showing also a dog or a pawl employed in detached position and the meansfor holding the same in position. Fig. 5 represents a side elevation,partly in section, showing a modified construction of pawl and themanner of attaching the same to the crank-shaft.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings, A designates the journal of a hub B of abicycle, said hub having a recess 0 located near the end thereof, inwhich recess is mounted an extremity of the dog D, the nose of whichlatter is adapted to engage the internal teeth or serrations E of thesmall sprocket-wheel F, which is loosely mounted on said hub, the largersprocketwheel 11 being mounted on the crank-axle G and power beingtransmitted from the larger to the smaller wheel byasprocket-chain (notshown) or other means. The crank-axle G is provided with cranks andpedals of the usual construction and has mounted thereon the tootheddisk or ratchet-wheel J, the teeth of which are adapted to be engaged bythe nose of the pawl K, which latter has the tongue L, mounted in therecess M of the casing N, which has a cut-out portion P, adapted toreceive the dog K at intervals, as will be explained. The casing N iscontained within the portion Q of the bicycle-frame and is provided witha recess R, adapted to receive the portion S of the bar T, one of whoseextremities engages the brake-shoe U, which is adapted to cont-act withthe tire V of the wheel \V.

The brake-shoe U is attached to the plate X, which latter has adownwardly-deflected portion Y, which joins the forwardly-extendingmember Z, which has a slot A therein, through which passes the bolt B,which engages the portion Q.

The bar T passes through the cross-piece O, which connects the braces D,which extend rearwardly from the portion Q of the bicycle-frame.

E designates a spring interposed between the cross-piece O and themember Y, which depends from the plate X.

In Fig. 5 we show a modified manner of attaching the pawl to thecrank-axle from that shown in Fig. 1, in which G designates thecrank-axle, as before, but having therein the recess G, in which ispivoted the pawl H, it being evident that when the axle G is rotated inthe direction of the arrow seen in Fig. 5, the pawl will not engage thebar S, but in the action of back-pedaling the pawl would ongage the barS, as seen in said Fig. 5, and the brake will be applied, as will beexplained in detail hereinafter.

In'Fig. 3 we have shown the dog D in the position it assumes when thehub B has made a half-revolution from the position seen in Fig. 1.

In Fig. tthe portion L of the dog K is held in position in the recess Mby means of the plugs M which are inserted in each extremity of therecess M and then headed or upset, whereby the portion L is positivelyheld in position in the casing N.

The operation is as follows: \Vhen the sprocket-wheels F and H arerevolving in the direction indicated by the arrows in full lines, itwill be evident that the engagement of the pawl or dog D with the teethE will cause the hub B, and consequently the wheel V, to revolve, andwhen the rotation of the wheel is checked or becomes stationary, whichmay be effected by the rider holding the pedals and crank-shaft Gstationary, it will be seen that the rotation of the hub B canreadilycontinue, since the nose of the pawl D will ride over the teeth Eby reason of the inclination of the latter. When the sprocket-wheel H isrotated in the direction of the arrow seen in full lines, the pawl ordog K will not engage the teeth of the ratchet-wheel J, but will ridefreely over the same. When, however, the rider begins to back-pedal orto rotate the wheel H in the direction of the dotted arrow, the dog Kwill interlock with a tooth of the ratchet-wheel, thus moving the bar Trearwardly, so that the shoe U contacts with the tire V, the spring Ecausing said shoe to normally assume its proper position and said shoebeing guided and supported by the slotted member Z. When the bicycle isbeing propelled forwardly, the dog K is normally thrown into the recessP, and it will be evident that by securing said dog to the casing N inthe manner described said casing is not unduly weakened.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. In an attachment for bicycles, a crankshaft, a ratchet-wheel mountedthereon, a case ing inclosing said ratchet-wheel and having a pivoteddog or pawl mounted therein, a bar adapted to enter a recess in saidcasing, a brake-shoe attached to said bar and a plate suitably securedto said brake-shoe and adapted to guide the same, said plate having aslot therein, and a bolt passing through said slot and engaging aportion of a bicycle-frame.

2. In an attachment for bicycles, a crankshaft having a ratchet-wheelmounted thereon, a casing inclosing said ratchet-wheel and having apivoted dog or pawl mounted there in, a recess in said casing for thereception of a portion of said dog,and within which such portion of thedog is secured, a bar adapted to enter a recess in said casing, abrake-shoe attached to said bar, a plate projecting forwardly, thendownwardly, thence forwardly from said brake-shoe, the last-mentionedportion of said plate having a slot therein, a bolt passing through saidslot and engaging a portion of the bicycle-frame, and a springinterposed between a portion of said plate and a cross-bar of saidframe.

JOHN F. MOANULTY. PETER VAN DEN BERGHE.

tVitnesses:

JOHN A. WIEDERSHEIM, WM. 0. WIEDERSHEIM.

Corrections in Letters Patent No. 633,605.

It is hereby certified that Letters Patent No. 638,605, grantedSeptember 26, 1899, upon the application of John F. McAnulty and PeterVan den Berghe, of Philadelphia, Pennsylvania, for an improvement inBack Pedaling Brakes, was erroneously issued i to John F. McAnulty,Michael S. Ley and Peter Van den Berghe, as joint owners of i saidinvention; whereas the patent should have been granted to said MichaelS. Ley and Peter Van den Berghe, they being sole owners of the entireinterest as shown by the assignments of record in the Patent Ofiice;also that the Words one-half in line i seven of the grant, and in theheading to the printed specification should be stricken out; and thatthe said Letters Patent should be read with these corrections thereinthat the same may conform to the record of the case in the PatentOflice.

t Signed, countersigned, and sealed this 10th day of October, A. 1).,1899. WEBSTER DAVIS,

[SEAL] Assistant Secretary of the Interior. E Oountersigned:

l O. H. DUELL, Commissioner of Patents.

